215065354397 has 2 divisors, whose sum is σ = 215065354398. Its totient is φ = 215065354396.

The previous prime is 215065354391. The next prime is 215065354423. The reversal of 215065354397 is 793453560512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141807977476 + 73257376921 = 376574^2 + 270661^2 .

It is a cyclic number.

It is not a de Polignac number, because 215065354397 - 2²⁰ = 215064305821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215065354391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107532677198 + 107532677199.

It is an arithmetic number, because the mean of its divisors is an integer number (107532677199).

Almost surely, 2^215065354397 is an apocalyptic number.

It is an amenable number.

215065354397 is a deficient number, since it is larger than the sum of its proper divisors (1).

215065354397 is an equidigital number, since it uses as much as digits as its factorization.

215065354397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402000, while the sum is 50.

The spelling of 215065354397 in words is "two hundred fifteen billion, sixty-five million, three hundred fifty-four thousand, three hundred ninety-seven".